UI not re-rendering when select field's values is updating since 0.30.0

[EzraBerendsen]

I just updated flutter_form_bloc to 0.30.0 and then to 0.30.1 and it seems like the functionality has changed on when to render if a select field is updated.

I have a text field that is dependant on what value is selected from the SelectFieldBloc, but since 0.30.0 it no longer re-renders the UI, thus leaving me with the problem that the UI is incorrect.

First I thought it was a mistake on my part, but it seems like reverting to 0.29.1 does the trick, so not quite sure what has been changed to the rendering logic.

I would gladly solve this in a PR, but my dart nor my bloc skills are good enough. 😬

[WahdanZ]

can you show me an example with this issue?

[EzraBerendsen]

can you show me an example with this issue?

import 'package:flutter/material.dart';
import 'package:flutter_form_bloc/flutter_form_bloc.dart';

class FormBlocExample extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: BlocProvider(
        create: (context) => Bloc(),
        child: BlocBuilder<Bloc, FormBlocState>(
          builder: (context, state) {
            final formBloc = BlocProvider.of<Bloc>(context);
            return Column(
              children: [
                DropdownFieldBlocBuilder<String>(
                  selectFieldBloc: formBloc.selectField,
                  decoration: InputDecoration(
                    labelText: 'DropdownFieldBlocBuilder222',
                    prefixIcon: Icon(Icons.sentiment_satisfied),
                  ),
                  itemBuilder: (context, value) => FieldItem(
                    child: Text(value),
                  ),
                ),
                TextFieldBlocBuilder(
                  textFieldBloc: formBloc.textField,
                  decoration: InputDecoration(
                    labelText: 'TextFieldBlocBuilder',
                    prefixIcon: Icon(Icons.text_fields),
                  ),
                ),
                // This updates on <0.30.0, but doesn't get updated on version >0.30.0
                formBloc.selectField.value == null
                    ? Text("value is null?")
                    : Text(formBloc.selectField.value!),
              ],
            );
          },
        ),
      ),
    );
  }
}

class Bloc extends FormBloc {
  Bloc() {
    addFieldBlocs(fieldBlocs: [selectField, textField]);
  }

  final selectField = SelectFieldBloc(items: ['option 1', 'option 2']);

  final textField = TextFieldBloc();

  @override
  void onSubmitting() {}
}

[WahdanZ]

it's related to this issue #283 to avoid is just this, rendering the widgets listen to the FormBloc every time its FieldBloc changes.

by do the following

   BlocBuilder(
                    bloc: formBloc.selectField,
                    builder: (context, state) {
                      return formBloc.selectField.value == null
                          ? Text("value is null?")
                          : Text(formBloc.selectField.value!);
                    })

[EzraBerendsen]

Ah! Interesting that this only showed up when updating to 0.30.0. I guess the API was maybe changed a bit? Thanks for the quick response! 🚀